That's a good tip not to have drinkable yogurt post-op. I just went and bought the drinkable yogurts today for pre-op, which starts Monday, and then post-op for after my Oct 23rd surgery. I think I will just drink them just for pre-op (since I bought them and don't want them to go to waste) and hold off for post-op. Congrats on the weight loss so far. That's great!